Filter
Top Products
USER’S GUIDE
050396 30/173
31
POWER CONTROL REGISTER
Label: PCON Register Address: 087H
D7 D6 D5 D4 D3 D2 D1 D0
SMOD POR PFW WTR EPFW EWT STOP IDL
Bit Description:
PCON.7 SMOD
“Double Baud Rate”: When set to a 1, the baud rate is doubled when the serial port is being used
in modes 1, 2, or 3.
Initialization: Cleared to a 0 on any reset.
Read Access: Can be read normally at any time.
Write Access: Can be written normally at any time.
PCON.6 POR
“Power On Reset”: Indicates that the previous reset was initiated during a Power On sequence.
Initialization: Cleared to a 0 when Power On Reset occurs. Remains at 0 until it is set to a 1
by software.
Read Access: Can be read normally at any time.
Write Access: Can be written only by using the Timed Access Register.
PCON.5: PFW
“Power Fail Warning”: Indicates that a potential power failure is in progress. Set to 1 whenever V
CC
voltage is below the V
PFW
threshold. Cleared to a 0 immediately following a
read operation of the PCON register. Once set, it will remain set until the
read operation occurs regardless of activity on V
CC
. After PFW is cleared by
a read, it will return to a 1 if V
CC
< V
PFW
.
Initialization: Cleared to a 0 during a Power On Reset.
Read Access: Can be read normally anytime.
Write Access: Not writable.
PCON.4: WTR
“Watchdog Timer Reset”: Set to a 1 following a Watchdog Timer timeout. If Watchdog Timer Reset is
enabled, this will indicate the cause of the reset. Cleared to 0 immediately
following a read of the PCON register.
Initialization: Set to a 1 after a Watchdog Timeout Reset. Cleared to a 0 on a Power On
Reset. Remains unchanged during other types of resets.
Read Access: May be read normally anytime.
Write Access: Cannot by written.